It's not entirely clear, but I believe it would be all because each spell has its own "I get countered if there is an enfeeble present" rule, so effectively they all get countered, they don't discount each other in 1:1 sense.

I would like to make a correction to blackmist's argument here. On page 71 in the last paragraph for the Counterspells section, it states " When a magical power is successfully used on a target already under the effects of a spell it can counter, both the new spell and the existing spell cease to work and have no further effect that turn"

This would mean that it does cancel out in a 1:1 ratio

However, if Blackmist is partially correct, then this could mean that once a spell is cast, the spells it counters no longer work for the rest of the turn. For instance, if you cast call winds on your own formation, it can no longer be targeted with a Pall of Night spell.

I'm with Forgotten Lore on this, nowhere does it say that there is a 1:1 ratio, just that the spell gets affected, therefore every spell has to check if it gets countered or not and all get countered at the same time.